毕业设计说明书课题名称：基于单片机的火灾报警器专业系轨道交通第1页班级2014届广铁供电订单班学生姓名徐淑玲指导老师刘运松完成日期2013年10月目录1前言..........................................................................................................................................31.1课题的开发背景............................................................................................................31.2课题设计的意义............................................................................................................31.3课题完成的功能............................................................................................................32总体方案设计..........................................................................................................................52.1方案比较........................................................................................................................52.2方案论证与选择............................................................................................................63单元模块设计..........................................................................................................................73.1各单元模块功能介绍与电路设计................................................................................73.1.1电路显示电路......................................................................................................73.1.2无线传输模块......................................................................................................93.1.3声光报警模块....................................................................................................103.1.4复位、时钟电路................................................................................................113.1.5程序下载模块....................................................................................................123.2特殊器件的介绍..........................................................................................................133.2.1STC89C52单片机.............................................................................................133.2.2温度传感器DS18B20.......................................................................................153.2.3烟雾传感器QM-N5..........................................................................................18表3.6QM-N5参数表...............................................................................................193.2.4NRF401..............................................................................................................204软件设计................................................................................................................................244.1下位机程序流程图......................................................................................................244.1.1火灾检测子程序流程图....................................................................................244.1.2温度获取子程序流程图....................................................................................254.2上位机程序流程图......................................................................................................275调试.............................................................................................................................
